prosody
a552f4170aed
util-src/windows.c

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util-src/windows.c @ 6413:a552f4170aed

util-src/*.c: Add macro for compiling with Lua 5.2
author Kim Alvefur <zash@zash.se>
date Wed, 17 Sep 2014 14:30:29 +0200
parent 6412:0e94f89d0e62
child 6615:8e4572a642cb
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1 /* Prosody IM
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Matthew Wild <mwild1@gmail.com>
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8 */
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9
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10 /*
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11 * windows.c
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12 * Windows support functions for Lua
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13 */
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14
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15 #include <stdio.h>
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16 #include <windows.h>
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17 #include <windns.h>
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18
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19 #include "lua.h"
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20 #include "lauxlib.h"
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21
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22 #if (LUA_VERSION_NUM == 502)
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23 #define luaL_register(L, N, R) luaL_setfuncs(L, R, 0)
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24 #endif
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25
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26 static int Lget_nameservers(lua_State *L) {
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27 char stack_buffer[1024]; // stack allocated buffer
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28 IP4_ARRAY* ips = (IP4_ARRAY*) stack_buffer;
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29 DWORD len = sizeof(stack_buffer);
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30 DNS_STATUS status;
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31
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32 status = DnsQueryConfig(DnsConfigDnsServerList, FALSE, NULL, NULL, ips, &len);
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33 if (status == 0) {
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34 DWORD i;
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35 lua_createtable(L, ips->AddrCount, 0);
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36 for (i = 0; i < ips->AddrCount; i++) {
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37 DWORD ip = ips->AddrArray[i];
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38 char ip_str[16] = "";
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39 sprintf_s(ip_str, sizeof(ip_str), "%d.%d.%d.%d", (ip >> 0) & 255, (ip >> 8) & 255, (ip >> 16) & 255, (ip >> 24) & 255);
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40 lua_pushstring(L, ip_str);
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41 lua_rawseti(L, -2, i+1);
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42 }
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43 return 1;
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44 } else {
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45 lua_pushnil(L);
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46 lua_pushfstring(L, "DnsQueryConfig returned %d", status);
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47 return 2;
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48 }
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49 }
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50
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51 static int lerror(lua_State *L, char* string) {
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52 lua_pushnil(L);
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53 lua_pushfstring(L, "%s: %d", string, GetLastError());
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54 return 2;
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55 }
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56
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57 static int Lget_consolecolor(lua_State *L) {
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58 HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
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59 WORD color; DWORD read_len;
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60
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61 CONSOLE_SCREEN_BUFFER_INFO info;
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62
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63 if (console == INVALID_HANDLE_VALUE) return lerror(L, "GetStdHandle");
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64 if (!GetConsoleScreenBufferInfo(console, &info)) return lerror(L, "GetConsoleScreenBufferInfo");
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65 if (!ReadConsoleOutputAttribute(console, &color, 1, info.dwCursorPosition, &read_len)) return lerror(L, "ReadConsoleOutputAttribute");
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66
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67 lua_pushnumber(L, color);
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68 return 1;
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69 }
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70 static int Lset_consolecolor(lua_State *L) {
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71 int color = luaL_checkint(L, 1);
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72 HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
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73 if (console == INVALID_HANDLE_VALUE) return lerror(L, "GetStdHandle");
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74 if (!SetConsoleTextAttribute(console, color)) return lerror(L, "SetConsoleTextAttribute");
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75 lua_pushboolean(L, 1);
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76 return 1;
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77 }
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78
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79 static const luaL_Reg Reg[] =
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80 {
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81 { "get_nameservers", Lget_nameservers },
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82 { "get_consolecolor", Lget_consolecolor },
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83 { "set_consolecolor", Lset_consolecolor },
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84 { NULL, NULL }
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85 };
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86
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87 LUALIB_API int luaopen_util_windows(lua_State *L) {
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88 lua_newtable(L);
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89 luaL_register(L, NULL, Reg);
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90 lua_pushliteral(L, "-3.14");
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91 lua_setfield(L, -2, "version");
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92 return 1;
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93 }